Exchange 2007 Receive Connector Custom Settings

I have an account with a POS system running on SBS 2008 Exchange 2007.  5 users.
Their POS system has some functionality in sending invoice copies via email upon request.  The system queues them up or sends immediately upon selecting the choice.

A module on the SBS2008 server actual does the sending.

I'm having trouble finding the right Exchange Receive Connector settings to allow outbound email from the server.  On the POS Email setup we are using a email address created in SBS as a standard user.  Email and password checked by logging in to OWA.

The specific error at this point is:
"The SMTP server requires a secure connection or the client was not authenticated. The server response was: 5.7.1 Client was not authenticated"

The Receive Connector:

All available IPv4 port 25
Receive from :


Permission Groups:
X Anonymous
X Exchange Users
X Exchange Servers

As an aside, if changes are made to the Receive Connector which services should be restarted etc.

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You should create a new connector (if not done so already)
And apply the following settings:

Under the network tab add only the IP of the server sending the mail , so remove the 0.0.0...

Select permission groups and select "exchange servers"

On the authentication tab select both "TLS" and "externally secured"

That should be it.

Again, be sure to limit connections to the connector by IP.

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BBraytonAuthor Commented:
I've made the change per your suggestion.  However the user is away on vacation until next week.

Will advise when they return.

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